Mobile device with a graphical icon



FIG. 1 is a front view of a mobile device with a graphical icon showing the new design; and,

FIG. 2 is a front view of a mobile device with a graphical icon showing an alternate embodiment.

The dashed lines shown in the figures form no part of the claimed design. 

CLAIM The ornamental design for a mobile device with a graphical icon, as shown and described. 